Avoid directly accessing ParseStream lookahead array in parser API

Author: c42f

src/parser.jl

@@ -1405,7 +1405,6 @@ function parse_call_chain(ps::ParseState, mark, is_macrocall=false)
                 # A.@foo a b    ==> (macrocall (. A (quote @foo)) a b)
                 # @A.foo a b    ==> (macrocall (. A (quote @foo)) a b)
                 n_args = parse_space_separated_exprs(ps)
-                # TODO: Introduce K"doc" to make this hack less awful.
                 is_doc_macro = peek_behind(ps, macro_name_position).orig_kind == K"doc"
                 if is_doc_macro && n_args == 1
                     # Parse extended @doc args on next line

src/parser_api.jl

@@ -152,7 +152,7 @@ function parseall(::Type{T}, input...; rule=:toplevel, version=VERSION,
     end
     parse(stream; rule=rule)
     if (ignore_trivia  && peek(stream, skip_newlines=true) != K"EndMarker") ||
-       (!ignore_trivia && (peek(stream); kind(first(stream.lookahead)) != K"EndMarker"))
+       (!ignore_trivia && (peek(stream, skip_newlines=false, skip_whitespace=false) != K"EndMarker"))
         emit_diagnostic(stream, error="unexpected text after parsing $rule")
     end
     if any_error(stream.diagnostics)

test/parse_stream.jl

@@ -6,7 +6,7 @@
 using JuliaSyntax: ParseStream,
     peek, peek_token,
     bump, bump_trivia, bump_invisible,
-    emit, emit_diagnostic
+    emit, emit_diagnostic, TRIVIA_FLAG, INFIX_FLAG
 
 code = """
 for i = 1:10